20434412404 has 48 divisors (see below), whose sum is σ = 42108046848. Its totient is φ = 8495359488.

The previous prime is 20434412377. The next prime is 20434412459. The reversal of 20434412404 is 40421443402.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80002 + ... + 217414.

It is an arithmetic number, because the mean of its divisors is an integer number (877250976).

Almost surely, 2^20434412404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20434412404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21054023424).

20434412404 is an abundant number, since it is smaller than the sum of its proper divisors (21673634444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20434412404 is a wasteful number, since it uses less digits than its factorization.

20434412404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137584 (or 137582 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 20434412404 its reverse (40421443402), we get a palindrome (60855855806).

The spelling of 20434412404 in words is "twenty billion, four hundred thirty-four million, four hundred twelve thousand, four hundred four".